Al-Adab Al-Mufrad #1040
Greetings
Mu'awiya ibn Qurra said that his father said to him, "My son,
when a man passes by you and says, 'Peace be upon you (plural).' Do not
say, 'And on you (singular)' as if you were singling out that greeting
out for him alone. Rather say, 'Peace be upon you (plural).'"
About Al-Adab Al-Mufrad
This hadith is #1040 from Al-Adab Al-Mufrad, in the Book of Greetings. Al-Adab Al-Mufrad contains 1,326 hadiths across 57 books.